[Vince]

udb_hash, despite the name given by DracoBlue, is NOT a hashing algorithm. This is a checksum algorithm better known as Adler32. It is incredibly insecure, can be cracked in seconds and is thus not suitable for passwords at all.

Use a proper algorithm like Whirlpool or Sha512 and add a salt. http://php.net/manual/en/function.hash.php